If you're going to go through the trouble, it's simpler and easier to just emulate on a computer. Doing that means the process you used isn't variable and not repeatable.

I presume most SNES games are already on the site.

I know the NES mini runs slower than an actual console so the SNES Mini might run slower as well (I’ve never actually checked or seen official comparisons).

So yeah, don’t do that because it’s not worth it and is probably slower anyway (plus it might not be allowed because of the console modding involved). Just emulate it on a traditional emulator if needed.